Display panel

ABSTRACT

A display panel includes an upper substrate to which external light is incident, a sealing member which is in a non-display area and couples the upper substrate to a lower display substrate. The upper display substrate includes: a base substrate; a light shielding layer and filter layer each corresponding to the non-display area and absorbing a portion of external light which is transmitted through the base substrate at the non-display area, the filter layer and the light shielding layer having different colors from each other. In a first non-display area of the base substrate which corresponds to the sealing member, only one among the filter layer and the light shielding layer is disposed. In a second non-display area of the base substrate which is adjacent to the first non-display area, both the filter layer and the light shielding layer are disposed.

This application claims priority to Korean Patent Application No.10-2019-0002732, filed on Jan. 9, 2019, and all the benefits accruingtherefrom under 35 U.S.C. § 119, the entire contents of which are herebyincorporated by reference.

BACKGROUND (1) Field

The present disclosure herein relates to a display panel, and moreparticularly, to a display panel having improved visibility of an imagedisplayed thereby.

(2) Description of the Related Art

Various display devices that are used for multimedia devices such as atelevision, a mobile phone, a tablet computer, a navigation unit, and agame console have been developed. Among display devices, aphoto-luminescent liquid crystal display (“LCD”) having an improvedlight utilization efficiency and an enhanced color balance has beendeveloped. Various display devices may be used in an outside environmentwhere there is external light.

SUMMARY

The present disclosure provides a display panel capable of relievingexternal light reflection.

An embodiment of the invention provides a display panel including: anupper display substrate defining a display area and a non-display areawhich is adjacent to the display area; a lower display substrate facingthe upper display substrate; and a sealing member which couples theupper display substrate to the lower display substrate, the sealingmember disposed in the non-display area. The upper display substrateincludes: a base substrate; a light shielding layer including a firstportion which corresponds to the display area and a second portion whichcorresponds to the non-display area; and a filter layer which is in thenon-display area, the filter layer having a color different from a colorof the second portion of the light shielding layer and overlapping thesealing member.

In an embodiment, the filter layer surrounds the display area on theplane.

In an embodiment, in the non-display area, the second portion of thelight shielding layer may overlap the sealing member.

In an embodiment, in the non-display area, the filter layer may bedisposed on the base substrate while entirely overlapping the sealingmember.

In an embodiment, the filter layer may cover at least one portion of thesecond portion of the light shielding layer.

In an embodiment, the filter layer may have one of blue and red colors,and the light shielding layer may have a black color.

In an embodiment, the display area may include first to third pixelareas and a light shielding area which is adjacent to the first to thirdpixel areas, and the lower display substrate may include a displayelement layer including first to third display elements each of whichemits light having a first color while overlapping the first to thirdpixel areas, respectively.

In an embodiment, the first portion of the light shielding layer maycorrespond to the light shielding area.

In an embodiment, the upper display substrate may further include acolor filter layer disposed on the base substrate, and the color filterlayer may include: a first color filter through which light having asecond color different from the first color is transmitted, the firstcolor filter corresponding to the first pixel area; a second colorfilter through which light having a third color different from the firstcolor and the second color is transmitted, the second color filtercorresponding to the second pixel area; and a third color filterincluding a filter portion through which light having the first color istransmitted, the filter portion of the third color filter correspondingto the third pixel area.

In an embodiment, the upper display substrate may further include alight control layer which receives the light having the first colorwhich is emitted from the first to third display elements and providescolor-converted light to the color filter layer, the light control layerincluding: a first conversion member which corresponds to the firstcolor filter, color-converts the light having the first color which isemitted from the display element layer into the light having the secondcolor, and emits the light having the second color to the first colorfilter; a second conversion member which corresponds to the second colorfilter, color-converts the light having the first color into the lighthaving the third color, and emits the light having the third color tothe second color filter; and a transmission member which corresponds tothe third color filter and transmits the light having the first color tothe third color filter.

In an embodiment, the light shielding layer may be integrated with thethird color filter.

In an embodiment, the filter layer may overlap an entirety of thenon-display area.

In an embodiment, each of the light shielding layer and the third colorfilter may have a blue color, and the filter layer may have a red color.

In an embodiment, the filter layer may correspond to the first area ofthe base substrate and extend from the first area of the base substrateto overlap an entirety of the second portion of the light shieldinglayer which is in the non-display area, and a portion of the filterlayer which corresponds to the sealing member may be directly on thebase substrate.

In an embodiment of the invention, a display panel includes: an upperdisplay substrate, the upper display substrate defining: a display areaincluding a plurality of pixel areas and a light shielding area which isadjacent to each of the plurality of pixel areas, and a non-display areawhich is adjacent to the display area; a lower display substrate facingthe upper display substrate; and a sealing member which couples theupper display substrate to the lower display substrate, the sealingmember disposed in the non-display area. The upper display substrateincludes: a base substrate; a color filter layer including a first lightshielding portion which corresponds to the light shielding area in thedisplay area and a second light shielding portion which corresponds tothe non-display area, each of the first light shielding portion and thesecond light shielding portion having a first color; and a filter layerwhich is in the non-display area, the filter layer disposednon-overlapping the sealing member.

In an embodiment, the filter layer may surround the display area.

In an embodiment, the first color may be a blue color, and the filterlayer may have a red color.

In an embodiment, the second light shielding portion may correspond toan entirety of the non-display area, and the sealing member may surroundthe filter layer.

In an embodiment, the color filter layer may include: a first colorfilter through which light having a second color different from thefirst color is transmitted, the first color filter corresponding to afirst pixel area among the plurality of pixel areas; a second colorfilter through which light having a third color different from the firstcolor and the second color is transmitted, the second color filtercorresponding to a second pixel area adjacent to the first pixel areaamong the plurality of pixel areas; and a third color filter including afilter portion corresponding to a third pixel area adjacent to thesecond pixel area among the plurality of pixel areas and through whichlight having the first color is transmitted. The first light shieldingportion and the second light shielding portion are in a same layer asthe filter portion and transmit the light having the first color.

An embodiment of the invention provides a display panel including:

an upper display substrate to which light from outside the display panelis incident, the upper display substrate defining a display area and anon-display area which is adjacent to the display area; a lower displaysubstrate facing the upper display substrate; and a sealing member whichcouples the upper display substrate to the lower display substrate, thesealing member disposed in the non-display area. The upper displaysubstrate includes: a base substrate through which the light fromoutside the display panel is transmitted; a light shielding layerincluding a first portion which corresponds to the display area and asecond portion which corresponds to the non-display area and absorbs aportion of light which is transmitted through the base substrate at thenon-display area; and a filter layer which is in the non-display areaand absorbs a portion of the light which is transmitted through the basesubstrate at the non-display area, the filter layer having a colordifferent from a color of the second portion of the light shieldinglayer. In the non-display area, the base substrate includes a first areawhich corresponds to the sealing member and a second area which isbetween the first area and the display area, in the first area of thebase substrate, only one among the filter layer and the second portionof the light shielding layer is disposed, and in the second area of thebase substrate: both the filter layer and the second portion of thelight shielding layer are disposed, and the second portion of the lightshielding layer is between the base substrate and the filter layer alonga thickness direction of the display panel.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the invention, and are incorporated in and constitute apart of this specification. The drawings illustrate embodiments of theinvention and, together with the description, serve to explainprinciples of the invention. In the drawings:

FIG. 1 is a perspective view illustrating an embodiment of a displaypanel;

FIG. 2 is a cross-sectional view of an embodiment of a display panel ofFIG. 1;

FIG. 3 is a top plan view of an embodiment of a display panel;

FIG. 4A is an enlarged top plan view illustrating an embodiment of pixelareas in a display area of a display panel;

FIG. 4B is an enlarged cross-sectional view illustrating an embodimentof a portion of a pixel area of a display panel;

FIG. 5 is a top plan view illustrating an embodiment of a display panel;

FIG. 6 is an enlarged cross-sectional view taken along line I-I′ of FIG.5;

FIG. 7A is an enlarged cross-sectional view illustrating region AA inFIG. 6;

FIG. 7B is a graph showing relative intensities versus wavelength rangesof color lights;

FIG. 8 is an enlarged schematic view illustrating opticalcharacteristics of an embodiment of a light control layer in FIG. 6;

FIG. 9A is a top plan view illustrating another embodiment of a displaypanel;

FIG. 9B is an enlarged cross-sectional view taken along line II-II′ inFIG. 9A;

FIG. 10 is an enlarged top plan view illustrating an embodiment of acolor filter in FIGS. 9A and 9B; and

FIG. 11 is an enlarged cross-sectional view illustrating still anotherembodiment of a display panel.

DETAILED DESCRIPTION

In this specification, it will also be understood that when onecomponent (or region, layer, portion) is referred to as being related toanother element such as being “on,” “connected to” or “coupled to”another component, it can be directly disposed relative to the onecomponent, or an intervening third component may also be present. Incontrast, when one component (or region, layer, portion) is referred toas being related to another element such as being “directly on,”“directly connected to” or “directly coupled to” another component, nointervening third component is present.

Like reference numerals refer to like elements throughout. Also, in thefigures, the thickness, ratio, and dimensions of components areexaggerated for clarity of illustration.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting. As used herein, thesingular forms “a,” “an,” and “the” are intended to include the pluralforms, including “at least one,” unless the content clearly indicatesotherwise. “At least one” is not to be construed as limiting “a” or“an.” “Or” means “and/or.” The term “and/or” includes any and allcombinations of one or more of the associated listed items.

It will be understood that although the terms such as “first” and“second” are used herein to describe various elements, these elementsshould not be limited by these terms. The terms are only used todistinguish one component from other components. For example, a firstelement referred to as a first element in one embodiment can be referredto as a second element in another embodiment without departing from thescope of the appended claims. The terms of a singular form may includeplural forms unless referred to the contrary.

Also, ““under”, “below”, “above”, “upper”, and the like are used forexplaining relation association of components illustrated in thedrawings. The terms may be a relation and described based on directionsexpressed in the drawings.

“About” or “approximately” as used herein is inclusive of the statedvalue and means within an acceptable range of deviation for theparticular value as determined by one of ordinary skill in the art,considering the measurement in question and the error associated withmeasurement of the particular quantity (i.e., the limitations of themeasurement system). For example, “about” can mean within one or morestandard deviations, or within ±30%, 20%, 10% or 5% of the stated value.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as generally understood bythose skilled in the art. Terms as defined in a commonly used dictionaryshould be construed as having the same meaning as in an associatedtechnical context, and unless defined apparently in the description, theterms are not ideally or excessively construed as having formal meaning.

The meaning of “include” or “comprise” specifies a property, a fixednumber, a step, an operation, an element, a component or a combinationthereof, but does not exclude other properties, fixed numbers, steps,operations, elements, components or combinations thereof.

Embodiments are described herein with reference to cross sectionillustrations that are schematic illustrations of idealized embodiments.As such, variations from the shapes of the illustrations as a result,for example, of manufacturing techniques and/or tolerances, are to beexpected. Thus, embodiments described herein should not be construed aslimited to the particular shapes of regions as illustrated herein butare to include deviations in shapes that result, for example, frommanufacturing. For example, a region illustrated or described as flatmay, typically, have rough and/or nonlinear features. Moreover, sharpangles that are illustrated may be rounded. Thus, the regionsillustrated in the figures are schematic in nature and their shapes arenot intended to illustrate the precise shape of a region and are notintended to limit the scope of the present claims.

When various display devices are used in an outside environment withsufficient external light, external light may be incident to a displaysurface of a display device, and then reflected and scattered at thedisplay surface. For example, a color of some components within thedisplay device may be visible through the display surface due to thereflected and scattered external light. The components within thedisplay device that are visible through the display surface mayundesirably degrade visibility of an image displayed by the displaydevice.

Hereinafter, embodiments of the invention will be described withreference to the accompanying drawings.

FIG. 1 is a perspective view illustrating an embodiment of a displaypanel. FIG. 2 is a cross-sectional view illustrating an embodiment of adisplay panel.

The display panel DP may be used for relatively large-sized electronicdevices such as monitors or outdoor advertisement boards as well asrelatively small and medium-sized electronic devices such as personalcomputers, notebook computers, personal digital terminals, navigationunits for vehicles, game consoles, smartphones, tablet computers, andcameras. The above-described devices are exemplified as merely examplesof display devices which generate and display an image, and thus, thedisplay panel DP may be adopted for other electronic devices unlessdeparting from the spirit and scope of the invention.

According to an embodiment of the invention, the display panel DP may beone of a liquid crystal display panel, an electrophoretic display panel,a microelectromechanical system (“MEMS”) display panel, anelectrowetting display panel, and an organic light emitting displaypanel. However, the embodiment of the invention is not limited thereto.

Although not separately shown, the display panel DP may further includea chassis member or a molding member. Also, when the display panel DP isa liquid crystal display panel, the display panel DP may be providedwith light from a backlight unit which generates and provides the lightto the display panel DP. One or more embodiment of the display panel DPmay be used in a display device which displays an image. Hereinafter, inthis specification, the display panel DP will be described as an organiclight emitting display panel. With the organic light emitting displaypanel, a separate backlight unit may be omitted since light is generatedwithin the organic light emitting display panel and emitted fordisplaying an image.

Referring to FIG. 1, the display panel DP may include a lower displaysubstrate 100 and an upper display substrate 200 which is spaced apartfrom the lower display substrate 100 while facing the same. Asillustrated in FIG. 1, the display panel DP may display an image througha display surface DP-IS. The display surface DP-IS is disposed in aplane which is parallel to a plane defined by a first direction DR1 anda second direction DR2 crossing each other. The upper display substrate200 may define the display surface DP-IS, without being limited thereto.

The display surface DP-IS may include a display area DA and anon-display area NDA which is adjacent to the display area DA. A pixelPX is disposed in the display area DA, and the pixel PX is not disposedin the non-display area NDA. The non-display area NDA is defined alongan edge of the display surface DP-IS. According to an embodiment of theinvention, the display area DA may be surrounded by the non-display areaNDA. However, the embodiment of the invention is not limited thereto. Inanother embodiment, for example, the non-display area NDA may beadjacent to less than all sides of the display area DA, such as beingadjacent to only one side of the display area DA, or omitted completely.A sum of a planar area of the display area DA and a planar area of thenon-display area NDA may define a total area of the display surfaceDP-IS, without being limited thereto.

A normal direction to the display surface DP-IS, e.g., a thicknessdirection of the display panel DP, is indicated by a third directionDR3. In this specification, an expression of “when viewed from a planeor on a plane” may represent a case of an element viewed along the thirddirection DR3. Hereinafter, a front surface (or top surface) and a rearsurface (or bottom surface) of each of members or units aredistinguished along the third direction DR3. However, directionsindicated by the first to third directions DR1, DR2, and DR3 may be arelation, and converted with respect to each other, e.g., converted intoan opposite direction.

According to an embodiment of the invention, although the display panelDP having a flat-type display surface DP-IS is illustrated, theinvention is not limited thereto. In an embodiment, for example, thedisplay panel DP may include a display surface DP-IS in which at least aportion has a curved shape or a three-dimensional shape. Thethree-dimensional display surface may include the display area DAprovided in plural and disposed in different planes or directions fromeach other.

Referring to FIG. 2, a cell gap GP corresponding to an inner spacebetween the upper display substrate 200 and the lower display substrate100 may be defined therebetween. At the cell gap GP, elements andcomponents of the upper display substrate 200 and the lower displaysubstrate 100 may be excluded. The cell gap GP may be maintained by anadhesive layer SLM that couples the upper display substrate 200 and thelower display substrate 100 to each other. In an embodiment, forexample, the adhesive layer SLM may include an organic adhesive memberor an inorganic adhesive member. As used throughout all portions of thisdisclosure, the adhesive layer SLM may be otherwise referred to as asealing member.

FIG. 3 is a top plan view illustrating an embodiment of a display panel.

Referring to FIG. 3, a planar arrangement relationship between signallines GL1 to GLn and DL1 to DLm and pixels PX11 to PXnm is illustrated.The signal lines GL1 to GLn and DL1 to DLm may include a plurality ofgate lines GL1 to GLn and a plurality of data lines DL1 to DLm.

Each of the pixels PX11 to PXnm is connected to a corresponding gateline of the plurality of gate lines GL1 to GLn and a corresponding dataline of the plurality of data lines DL1 to DLm. Each of the pixels PX11to PXnm may include a pixel driving circuit and a display element whichis connected to the pixel driving circuit and driven or controlledthereby to generate light, emit light and/or display an image.Additional signal lines may be provided in the display panel DPaccording to a configuration of the pixel driving circuit. Variouscontrol signals, driving signals, power signals, data signals, etc. aretransmitted through respective signal lines to drive and/or control thepixels PX11 to PXnm and elements thereof to generate light, emit lightand/or display an image.

Although the pixels PX11 to PXnm may be arranged in a matrix form alonga plane such as that defined by the first direction DR1 and the seconddirection DR2 in FIG. 3, the invention is not limited thereto. In anembodiment, for example, the pixels PX11 to PXnm may be arranged in aPenTile matrix form. Alternatively, the pixels PX11 to PXnm may bearranged in a diamond form.

A gate driving circuit GDC may be disposed in the non-display area NDA.The gate driving circuit GDC may be integrated to the display panel DPthrough an oxide silicon gate driver circuit (“OSG”) or amorphoussilicon gate driver circuit (“ASG”) process.

FIG. 4A is a top plan view illustrating pixel areas of the display areaof the display panel according to an embodiment of the invention. FIG.4B is a cross-sectional view illustrating a portion of the pixel area ofthe display panel according to an embodiment of the invention.

FIG. 4A is an enlarged top plan view illustrating an embodiment of aportion of the display area DA in FIG. 1. The display area DA mayinclude a pixel area PXA provided in plurality (e.g., a plurality ofpixel areas PXA) and a light shielding area NPXA which is disposedadjacent thereto and therebetween. For convenience of description, afirst pixel area PXA-R, a second pixel area PXA-G and a third pixel areaPXA-B are mainly illustrated in FIG. 4A. As used throughout all portionsof this disclosure, the first pixel area PXA-R, the second pixel areaPXA-G and the third pixel area PXA-B may be otherwise referred to aspixel areas PXA-R, PXA-G, and PXA-B or the first to third pixel areasPXA-R, PXA-G, and PXA-B. The pixel areas PXA-R, PXA-G, and PXA-Billustrated in FIG. 4A may be repeatedly arranged over an entirety ofthe display area DA.

The light shielding area NPXA is disposed adjacent to and around thefirst to third pixel areas PXA-R, PXA-G, and PXA-B. The first to thirdpixel areas PXA-R, PXA-G, and PXA-B and the light shielding area NPXAmay be substantially defined with respect to planar areas of the upperdisplay substrate 200. In this specification, a pixel area may representan area of the upper display substrate 200 at which external light issubstantially emitted through the display surface DP-IS in FIG. 1.

Although the first to third pixel areas PXA-R, PXA-G, and PXA-Bexemplarily have the same planar area as each other in FIG. 4A, theembodiment of the invention is not limited thereto. The first to thirdpixel areas PXA-R, PXA-G, and PXA-B and the light shielding area NPXAmay have different planar areas from each other, or at least two thereofmay have different planar areas from each other.

Although each of the first to third pixel areas PXA-R, PXA-G, and PXA-Bhas a rectangular planar shape having a round corner in the top planview, the embodiment of the invention is not limited thereto. In anembodiment, for example, each of the first to third pixel areas PXA-R,PXA-G, and PXA-B may have another polygonal planar shape or a regularpolygonal shape having a round corner.

One of the first to third pixel areas PXA-R, PXA-G, and PXA-B providesfirst color light within a first color wavelength band, another thereofprovides second color light within a second color wavelength band andwhich is different from the first color, and the remaining one thereofprovides third color light within a third color wavelength band andwhich is different from the first color and the second color.

According to an embodiment of the invention, the first pixel area PXA-Rmay provide red light, the second pixel area PXA-R may provide greenlight, and the third pixel area PXA-B may provide blue light. Accordingto an embodiment of the invention, source light to each of the first tothird pixel areas PXA-R, PXA-G, and PXA-B may be blue light that is thefirst color light. The source light may be generated from a light sourcewhich is separate from the display panel DP, such as a backlight unit,or a display element such as a light emitting diode which is within thedisplay panel DP.

The light shielding area NPXA may define a boundary between the first tothird pixel areas PXA-R, PXA-G, and PXA-B to reducing or effectivelyprevent mixing of color light between the first to third pixel areasPXA-R, PXA-G, and PXA-B. Also, the light shielding area NPXA blocks thesource light to reduce or effectively prevent the source light frombeing emitted to outside the display panel DP at areas thereof whichsource light should not be visible to outside the display panel DP.

FIG. 4B exemplarily illustrates an enlarged cross-section of the displaypanel DP, which corresponds to the second pixel area PXA-G. The enlargedcross-section of FIG. 4B illustrates a driving transistor T-D and alight emitting element OLED which is connected to the driving transistorT-D and controlled and/or driven thereby to generate and/or emit light.Here, the upper display substrate 200 is simply illustrated in FIG. 4B,without defining elements or components thereof in detail.

Referring to FIG. 4B, the lower display substrate 100 includes a firstbase substrate BS1, a circuit element layer DP-CL disposed on the firstbase substrate BS1, and a display element layer DP-OLED disposed on thecircuit element layer DP-CL.

The first base substrate BS1 may include a synthetic resin substrate ora glass substrate. The circuit element layer DP-CL includes at least oneinsulation layer and a circuit element. The circuit element includes asignal line and a driving circuit of a pixel. In an embodiment of amethod of providing a display panel DP, the circuit element layer DP-CLmay be provided or formed through a process of providing or forming aninsulation layer, a semiconductor layer, and a conductive layer such asby coating, deposition, or the like, and a process of patterning theinsulation layer, the semiconductor layer, and the conductive layer suchas by a photolithography process.

The circuit element layer DP-CL may include a buffer layer BFL, a firstinsulation layer 10, a second insulation layer 20, and a thirdinsulation layer 30. In an embodiment, for example, each of the firstinsulation layer 10 and the second insulation layer 20 may be aninorganic layer, and the third insulation layer 30 may be an organiclayer. However, the invention is not limited thereto. In anotherembodiment, for example, each of the first insulation layer 10 and thesecond insulation layer 20 may be a layer in which the inorganic layerand the organic layer are combined.

In FIG. 4B, an arrangement relationship between a semiconductor patternOSP, a control electrode GE, an input electrode DE, and an outputelectrode SE of the driving transistor T-D is exemplarily illustrated.First to third through-holes CH1, CH2, and CH3 are also exemplarilyillustrated.

The display element layer DP-OLED includes the light emitting elementOLED as a display element. The light emitting element OLED may generatethe above-described source light. The light emitting element OLEDincludes a first electrode AE, a second electrode CE, and a lightemitting layer ENL disposed therebetween. In the embodiment, the lightemitting element OLED may include an organic light emitting diode.

The display element layer DP-OLED includes a pixel defining layer PDL.In an embodiment, for example, the pixel defining layer PDL may be anorganic layer.

The first electrode AE is disposed on the third insulation layer 30. Thefirst electrode AE is connected to the output electrode SE at or througha third contact hole CH3 passing through a thickness of the thirdinsulation layer 30. A light emitting opening OP is defined in and bythe pixel defining layer PDL. The display area DA may include the lightemitting opening OP provided in plurality. The light emitting opening OPof the pixel defining layer PDL exposes at least a portion of the firstelectrode AE. According to an embodiment of the invention, the lightemitting opening OP may be defined as a light emitting area at whichlight from the light emitting element OLED is emitted outside the lightemitting element OLED. That is, the light emitting area may be providedin plurality corresponding to the light emitting opening OP provided inplurality within the display area DA, and the plurality of lightemitting areas may correspond to the pixel areas, respectively.

A hole control layer HCL, the light emitting layer ENL, and an electroncontrol layer ECL may be common disposed on each of the first electrodeAE and the pixel defining layer PDL. The hole control layer HCL, thelight emitting layer ENL, and the electron control layer ECL may bedisposed in common to correspond to each of the first to third pixelareas PXA-R, PXA-G, and PXA-B (refer to FIG. 4A).

The hole control layer HCL may include a hole transporting layer, andmay further include a hole injection layer. The light emitting layer ENLmay generate blue light. The blue light may have a wavelength of about410 nanometers (nm) to about 480 nm. The blue light may have a maximumpeak in a light emitting spectrum of about 440 nm to about 460 nm. Theelectron control layer ECL may include an electron transporting layerand an electron injection layer. The light emitting layer ENL may have atandem structure or a single layer structure.

The second electrode CE is disposed on the electron control layer ECL.The second electrode CE may be disposed in common corresponding to eachof the first to third pixel areas PXA-R, PXA-G, and PXA-B. The secondelectrode CE has a planar area greater than that of the first electrodeAE. That is, the electrode CE may extend further than edges of the firstelectrode AE define the planar area greater than that of the firstelectrode AE. A cover layer CL, which protects the second electrode CE,may be further disposed on the second electrode CE. The cover layer CLmay include an organic material or an inorganic material. In anembodiment, the cover layer CL may be omitted.

Although not separately shown, the lower display substrate 100 mayinclude the light emitting element OLED provided in plurality such as todefine first to third light emitting elements respectively correspondingto the first to third pixel areas PXA-R, PXA-G, and PXA-B in FIG. 4A.The first to third light emitting elements may have the same laminatedstructure as each other, and have the laminated structure of the lightemitting element OLED in FIG. 3B.

FIG. 5 is a top plan view illustrating an embodiment of a display panel.FIG. 6 is an enlarged cross-sectional view taken along line I-I′ of FIG.5. FIG. 7A is an enlarged cross-sectional view illustrating region AA inFIG. 6. FIG. 7B is a graph showing relative intensities versuswavelength ranges of color lights. FIG. 8 is an enlarged schematic viewillustrating optical characteristics of an embodiment of a light controllayer in FIG. 6. Here, the lower display substrate 100 is simplyillustrated in FIGS. 6 and 7A, without defining elements or componentsthereof in detail.

Referring to FIG. 5, since light emitted from the light emitting elementOLED described in FIG. 4B is not visible at the non-display area NDA ofthe display panel DP, the upper display substrate 200 may include alight shielding layer BY overlapping the non-display area NDA. In anembodiment, for example, the light shielding layer BY may be disposedcloser to the display area DA than the adhesive layer SLM disposedbetween the upper display substrate 200 and the lower display substrate100.

The adhesive layer SLM may overlap the non-display area NDA and surroundthe display area DA on a plane. The adhesive layer SLM may be disposedbetween the upper display substrate 200 and the lower display substrate100 while being disposed adjacent to an edge of the display panel DP.The light shielding layer BY according to an embodiment of the inventionmay have a black color.

In an embodiment of a method of providing a display panel DP, a materialfor forming the adhesive layer SLM may be disposed between the upperdisplay substrate 200 and the lower display substrate 100, and thenultraviolet light rays may be irradiated to material for curing thematerial and forming the adhesive layer SLM. In this case, theultraviolet light rays irradiated to the material for forming theadhesive layer SLM may be incident through the upper display substrate200.

According to an embodiment of the invention, the light shielding layerBY may partially overlap the non-display area NDA instead of overlappingan entirety of the non-display area NDA. In an embodiment, for example,the light shielding layer BY may not overlap at least a portion of theadhesive layer SLM.

Accordingly, the ultraviolet light rays incident through the upperdisplay substrate 200 in a method of providing a display panel DP may beirradiated to the adhesive layer SLM at an area where the lightshielding layer BY is excluded.

External light may be incident from outside the display panel DP througha planar area of the upper display substrate 200 which is in thenon-display area NDA and disposed non-overlapping with the adhesivelayer SLM. That is, the external light incident through the planar areaof the upper display substrate 200 may transmit to an inside of thedisplay panel DP, may be reflected from the inside of the display paneland transmitted to the outside again. As a result, visibility of animage which is displayed by the display panel DP is degraded by externalreflection.

According to one or more embodiment of the invention, the upper displaysubstrate 200 may include a filter layer FY covering the planar area ofthe upper display substrate 200 at which external light is transmittedthrough the upper display substrate 200 to be incident inside thedisplay panel DP. Unlike the light shielding layer BY which absorbsexternal ultraviolet light rays which are be irradiated to the materialfor forming the adhesive layer SLM in a method of providing a displaypanel DP, the filter layer FY may allow transmission of ultravioletlight rays therethrough. Also, the filter layer FY may absorb light in apredetermined wavelength range within a wavelength range of externallight incident to the display panel DP from the outside thereof. Theexternal light may be considered natural light or light other than theultraviolet light rays described above which used in a process offorming the adhesive layer SLM.

In an embodiment, for example, as illustrated in FIG. 5, the filterlayer FY may overlap an entirety of the adhesive layer SLM and surroundthe display area DA in the top plan view. In FIG. 6, for example, aminimum distance from the display area DA to an outermost portion of thefilter layer FY may be greater than a minimum distance from the displayarea DA to an outermost portion of the adhesive layer SLM. As usedthroughout all portions of this disclosure, the outermost portion of anelement or component may be defined as an outer edge or boundarythereof. These distances may be taken along a horizontal direction inFIG. 6, where such horizontal direction may represent the firstdirection DR1 and/or the second direction DR2.

However, the embodiment of the invention is not limited thereto. Inanother example, a minimum distance from the display area DA to anoutermost portion of the filter layer FY may be substantially the sameas a minimum distance from the display area DA to an outermost portionof the adhesive layer SLM.

Specifically, referring to FIG. 6, the upper display substrate 200includes a second base substrate BS2, the light shielding layer BY, acolor filter layer CFY, a light control layer CCL, a first upperinsulation layer LY, and a second upper insulation layer IY. Althoughnot shown, in another embodiment of the invention, when display elementscorresponding to the first to third pixel areas PXA-R, PXA-G, and PXA-Bgenerate light having different colors from each other, the lightcontrol layer CCL may be omitted.

The second base substrate BS2 may include a synthetic resin substrate ora glass substrate. The light shielding layer BY and the color filterlayer CFY divided by the light shielding layer BY may be disposed on thesecond base substrate BS2.

The light shielding layer BY includes a first portion BMa overlappingthe display area DA and a second portion BMb overlapping the non-displayarea NDA. The first portion BMa of the light shielding layer BYcorresponds to the light shielding area NPXA described for FIG. 4A, andthe light shielding layer BY in FIG. 5 corresponds to the second portionBMb.

A first color filter CF1, a second color filter CF2 and a third colorfilter CF3 may be disposed on the second base substrate BS2. As usedthroughout all portions of this disclosure, the first color filter CF1,the second color filter CF2 and the third color filter CF3 may otherwisebe referred to as first to third color filters CF1, CF2, and CF3.According to an embodiment of the invention, the first to third colorfilters CF1, CF2, and CF3 may be disposed on the second base substrateBS2. In an embodiment, the first to third color filters CF1, CF2, andCF3 directly disposed on a bottom surface of the second base substrateBS2 decrease a reflectance of external light incident to the displaypanel DP from outside thereof. The reflectance of external light maydecrease because each of the first to third color filters CF1, CF2, andCF3 transmits light in a specific wavelength range and absorbs light ina remaining wavelength range with respect to a total wavelength range ofthe external light.

The first color filter CF1 may transmit light corresponding to awavelength range of a second color and absorb light in a remainingwavelength range while overlapping the first pixel area PXA-R in FIG.4A. In an embodiment, for example, the second color may be a red color.

The second color filter CF2 may transmit light corresponding to awavelength range of a third color and absorb light in a remainingwavelength range while overlapping the second pixel area PXA-B. In anembodiment, for example, the third color may be a green color.

The third color filter CF3 may transmit light corresponding to awavelength range of a first color and absorb light in a remainingwavelength range while overlapping the third pixel area PXA-B. Asdescribed above, the first color light may be the blue light that is thesource light.

According to an embodiment of the invention, the first to third colorfilters CF1, CF2, and CF3 overlapping the display area DA may be dividedinto planar areas or portions of the color filter layer CFY by the firstportion BMa of the light shielding layer BY. The second portion BMb ofthe light shielding layer BY may surround the color filter layer CFY asa collection of the first to third color filters CF1, CF2, and CF3 on aplane.

The filter layer FY may be disposed on the second base substrate BS2while covering at least a portion of the second portion BMb of the lightshielding layer BY. In an embodiment, for example, the filter layer FYmay be directly disposed on the second base substrate BS2 while coveringat least a portion of the second portion BMb.

As illustrated in FIG. 7A, the filter layer FY may overlap an entiretyof the adhesive layer SLM. In particular, the filter layer FY maytransmit ultraviolet light rays UV which are incident from outside theupper display substrate 200 and used to cure a material for forming theadhesive layer SLM. On the other hand, the second portion BMb of thelight shielding layer BY blocks the ultraviolet light rays UV byabsorbing the ultraviolet light rays UV. In an embodiment, for example,the light shielding layer BY has a black color.

According to an embodiment of the invention, the filter layer FY mayhave one of a blue color and a red color. As illustrated in FIG. 7B,when the filter layer FY has a blue color, the filter layer FY maytransmit light within a blue wavelength range or absorb light within ared wavelength range and a green wavelength range.

For another example, when the filter layer FY has a red color, thefilter layer FY may transmit light having the red wavelength range orabsorb light having the green wavelength range and the blue wavelengthrange.

As described above, the filter layer FY according to an embodiment ofthe invention may reduce reflection of external light whilesimultaneously transmitting the ultraviolet light rays for curing theadhesive layer SLM. As a result, as overall external light reflection ofthe display panel DP is reduced, visibility may be enhanced.

Referring to FIG. 6 again, the first upper insulation layer LY may bedisposed on the second base substrate BS2 while covering the firstportion BMa of the light shielding layer BY and the first to third colorfilters CF1, CF2, and CF3, which overlap the display area DA. Also, thefirst upper insulation layer LY may cover the second portion BMb of thelight shielding layer BY and the filter layer FY, which overlap thenon-display area NDA.

The light control layer CCL is disposed on the first upper insulationlayer LY. The light control layer CCL may convert the first color lightemitted from the display element layer DP-OLED (refer to FIG. 4B) intolight having a different color or transmit the first color light. Thatis, the light control layer CCL may color-convert the first color lightemitted from the display element layer DP-OLED (refer to FIG. 4B) intolight having a different color, or may transmit the first color lightwithout color-conversion thereof. As color-converting, a wavelength ofthe first color light emitted from the display element layer DP-OLED(refer to FIG. 4B) may be changed into light having a differentwavelength.

The light control layer CCL includes a first conversion member CCF1, asecond conversion member CCF2, and a transmission member CCF3. The firstconversion member CCF1 may overlap the first pixel area PXA-R andconvert the first color light to emit second color light that isdifferent in color from the first color light. The second conversionmember CCF2 may overlap the second pixel area PXA-G and convert thefirst color light to emit third color light that is different in colorfrom the second color light. The transmission member CCF3 may overlapthe third pixel area PXA-B and emit first color light.

The second upper insulation layer IY may be disposed on the first upperinsulation layer LY while covering the light control layer CCL.

Referring to FIG. 8, a first luminescent material EP-R may absorb thefirst color light, which is blue light, to emit the second color light,which is red light, and a second luminescent material EP-G may absorbthe first color light to emit the third color light, which is greenlight. The transmission member CCF3 may not include a luminescentmaterial. The transmission member CCF3 may transmit the first colorlight without color-conversion thereof.

Also, each of the first conversion member CCF1, the second conversionmember CCF2, and the transmission member CCF3 may include a base resinBR. The base resin BR may be a polymer resin. In an embodiment, forexample, the base resin BR may include an acryl-based resin, aurethane-based resin, a silicon-based resin, and an epoxy-based resin.The base resin BR may be a transparent resin.

Also, each of the first conversion member CCF1, the second conversionmember CCF2, and the transmission member CCF3 may further include ascattering particle OL provided in plurality. As used throughout allportions of this disclosure, the scattering particle OL provided inplurality may be otherwise referred to as scattering particles OL. Thescattering particles OL may include TiO₂ or silica-based nano-particles.The scattering particles OL may scatter light emitted from theluminescent material to emitted outside of the light control layer CCL.Also, when source light is directly transmitted like the transmissionmember CCF3, the scattering particles OL may scatter the source light tobe emitted to outside of the light control layer CCL.

The first luminescent material EP-R and the second luminescent materialEP-G included in the color control layer CCL may be fluorescentmaterials or quantum dots. In other words, in an embodiment, the colorcontrol layer CCL may include at least one of the fluorescent materialsor the quantum dots as the first luminescent material EP-R and thesecond luminescent material EP-G.

The fluorescent materials used as the first luminescent material EP-Rand the second luminescent material EP-G may include or be an inorganicfluorescent material. In the display panel DP, the fluorescent materialused as the first luminescent material EP-R and the second luminescentmaterial EP-G may be a red fluorescent material and a green fluorescentmaterial, respectively.

The green fluorescent material may include at least one selected fromYBO3:Ce3+,Tb3+, BaMgAl10O17:Eu2+, Mn2+, (Sr,Ca,Ba)(Al,Ga)2S4:Eu2+;ZnS:Cu,Al, Ca8Mg(SiO4)4Cl2: Eu2+,Mn2+; Ba2SiO4: Eu2+; (Ba,Sr)2SiO4:Eu2+;Ba2(Mg, Zn)Si2O7:Eu2+; (Ba,Sr)Al2O4:Eu2+, Sr2Si3O8.2SrCl2:Eu2+.

The red fluorescent material may include at least one selected from(Sr,Ca,Ba,Mg)P2O7: Eu2+, Mn2+, CaLa2S4:Ce3+; SrY2S4: Eu2+, (Ca,Sr)S:Eu2+, SrS:Eu2+, Y2O3: Eu3+,Bi3+; YVO4: Eu3+,Bi3+; Y2O2S: Eu3+,Bi3+;Y2O2S: Eu3+.

However, the fluorescent materials used in the color control layer

CCL are not limited to the materials described above. In other words,the fluorescent materials may use other fluorescent materials inaddition to the fluorescent material materials described above.

In other embodiments, the first luminescent material EP-R and the secondluminescent material EP-G included in the color control layer CCL mayinclude or be quantum dots. The quantum dot may include a group II-VIcompound, a group III-V compound, a group IV-VI compound, a group IVelement, a group IV compound, or any combination thereof.

The group II-VI compound may be selected from a binary compound selectedfrom CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, andany combination thereof; a ternary compound selected from AgInS, CuInS,CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS,CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe,MgZnS, and any combination thereof; and a quaternary compound selectedfrom HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe,HgZnSeS, HgZnSeTe, HgZnSTe, and any combination thereof.

The group III-V compound may be selected from a binary compound selectedfrom GaN, GaP, GaAs, GaSb, AIN, AlP, AlAs, AlSb, InN, InP, InAs, InSb,and any combination thereof; a ternary compound selected from GaNP,GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP,InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, and any combination thereof,and a quaternary compound selected from GaAlNAs, GaAlNSb, GaAlPAs,GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs,InAlNSb, InAlPAs, InAlPSb, and any combination thereof.

The group IV-VI compound may be selected from a binary compound selectedfrom SnS, SnSe, SnTe, PbS, PbSe, PbTe, and any combination thereof; aternary compound selected from SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe,PbSTe, SnPbS, SnPbSe, SnPbTe, and any combination thereof, and aquaternary compound selected from SnPbSSe, SnPbSeTe, SnPbSTe, and anycombination thereof. The group IV element may be selected from Si, Ge,and a combination thereof. The group IV compound may include or be abinary compound selected from SiC, SiGe, and a combination thereof.

In embodiments, the binary compound, the ternary compound, or thequaternary compound may exist in the quantum dot with a substantiallyuniform concentration. Alternatively, a concentration of the binarycompound, the ternary compound or the quaternary compound in a portionof the quantum dot may be different from that of the binary compound,the ternary compound or the quaternary compound in another portion ofthe quantum dot.

The quantum dot may have a core-shell structure including a core and ashell which surrounds the core. Alternatively, the control member mayhave a core-shell structure in which one quantum dot surrounds anotherquantum dot. An interface of the core and the shell may have aconcentration gradient in which a concentration of a material or anelement existing in the shell becomes progressively less toward a centerof the core-shell structure.

The quantum dot may be a nano-sized particle. The quantum dot may have afull width of half maximum (“FWHM”) of an emission wavelength spectrumthat is about 45 nm or less (in particular, about 40 nm or less, and inmore particular, about 30 nm or less), and color purity and/or colorreproduction can be improved in the range. In addition, light emitted bythe quantum dot may be emitted in all directions, and thus a relativelywide viewing angle can be improved or realized.

Furthermore, a shape of the quantum dot may be a general shape known inthe art but is not limited to a specific shape. In an embodiment, forexample, the quantum dot may have a spherical shape, a pyramidal shape,a multi-arm shape, a cubic nanoparticle shape, a nanotube shape, ananowire shape, a nanofiber shape, or a nano-plate particle shape.

According to an embodiment of the invention, the quantum dot may emitlight of which a color is varied according to a particle size. When eachof the first luminescent material EP-R and the second luminescentmaterial EP-G is a quantum dot, the first luminescent material EP-R andthe second luminescent material EP-G may have different particle sizesfrom each other. In an embodiment, for example, the first luminescentmaterial EP-R may have a particle size greater than that of the secondluminescent material EP-G. Here, the first luminescent material EP-R mayemit light having a relatively longer wavelength than the secondluminescent material EP-G.

FIG. 9A is a top plan view illustrating another embodiment of a displaypanel DPA. FIG. 9B is an enlarged cross-sectional view taken along lineII-II′ in FIG. 9A. FIG. 10 is a top plan view illustrating an embodimentof a color filter in FIGS. 9A and 9B.

A display panel DPa in FIG. 9A has the substantially same configurationas the display panel DP in FIG. 5 except for the filter layer FY and thelight shielding layer BY. Thus, redundant description will be omitted inFIGS. 9A and 9B for convenience of description.

Referring to FIG. 9A, a filter layer FYa may surround a display area DAand may not overlap an adhesive layer SLM. The adhesive layer SLM maysurround the filter layer FYa, that is, be disposed closer to an edge ofthe display panel DPA than the filter layer FYa. That is, while thefilter layer FY in FIG. 5 overlaps the adhesive layer SLM, the filterlayer FYa in FIG. 9A is disposed non-overlapping with the adhesive layerSLM.

In an embodiment, the filter layer FYa may have a red color.

In detail, referring to FIG. 9B, first to third color filters CF1, CF2,and CF3 of a color filter layer CFY may be disposed on a second basesubstrate BS2.

According to an embodiment of the invention, the first to third colorfilters CF1, CF2, and CF3 may be directly disposed on the second basesubstrate BS2.

According to an embodiment of the invention, each of the first to thirdcolor filters CF1, CF2, and CF3 may have a refractive index similar tothat of the second base substrate BS2. As a result, external lightincident from outside the upper display substrate 200 may be transmittedthrough the second base substrate BS2 and incident to the first to thirdcolor filters CF1, CF2, and CF3. Accordingly, external light reflection,which is generated at an interface between the second base substrateBS2, and the first to third color filters CF1, CF2, and CF3, may bereduced.

In particular, the third color filter CF3 may be divided into a filterportion BP1 serving as a color filter and a light shielding portionserving as a light shielding pattern. The filter portion BP1 may overlapand correspond to the third pixel area PXA-B. The light shieldingportion includes a first light shielding portion BP2 a overlapping thelight shielding area NPXA, and a second light shielding portion BP2 boverlapping the non-display area NDA. In an embodiment, for example, thesecond light shielding portion BP2 b may overlap an entirety of thenon-display area NDA and extend from the non-display area NDA topartially overlap the display area DA.

As illustrated in FIG. 10, the third color filter CF3 defines a firstopening B-OP1 corresponding to the first pixel area PXA-R and a secondopening B-OP2 corresponding to the second pixel area PXA-G. In anembodiment of a method of manufacturing a display panel, an organicmaterial layer for forming the color filter layer CFY has a blue colorand is formed on one surface of the second base substrate BS2, and thenthe organic material layer is exposed and developed to form the firstopening B-OP1 and the second opening B-OP2. That is, the filter portionBP1 and the first light shielding portion BP2 a may be integrated witheach other as being portions of a same material layer used in formingthe color filter layer CFY. Also, the second light shielding portion BP2b, the filter portion BP1 and the first light shielding portion BP2 amay be integrated with each other as being portions of a same materiallayer used in forming the color filter layer CFY in FIG. 10.

Although not shown, the first color filter CF1 is disposed in the firstopening B-OP1 defined in the third color filter CF3. The first colorfilter CF1 may be disposed overlapping the first light shielding portionBP2 a while covering an entirety of the first opening B-OP1. The secondcolor filter CF2 is disposed in the second opening B-OP2 defined in thethird color filter CF3. The second color filter CF2 may be disposedoverlapping the first light shielding portion BP2 a while covering anentirety of the second opening B-OP2.

Referring to FIG. 9B again, the filter layer FYa may be disposed on thesecond light shielding portion BP2 b while overlapping the non-displayarea NDA. Also, as described above, the filter layer FYa may not overlapthe adhesive layer SLM at any portion thereof. However, the embodimentof the invention is not limited thereto. In an embodiment, for example,the filter layer FYa may not overlap at least a portion of the adhesivelayer SLM.

As the second light shielding portion BP2 b has a blue color, which isthe same color as the third color filter CF3, external ultraviolet lightrays may be transmitted through the second light shielding portion BP2b. Also, as the filter layer FYa non-overlaps the adhesive layer SLM,the ultraviolet light rays incident through the second base substrateBS2 from the outside may be transmitted to the adhesive layer SLMthrough the second light shielding portion BP2 b.

Also, the filter layer FYa may be disposed over an entirety of thesecond light shielding portion BP2 b except for a portion thereofoverlapping the adhesive layer SLM. Thus, reflection of the externallight incident from outside the display panel DPa may be reduced, andtransmission of the first color light emitted from the display elementlayer DP-OLED through the non-display area NDA to the outside of thedisplay panel DPa may be reduced or effectively prevented.

Specifically, the second light shielding portion BP2 b may absorb lightin a remaining wavelength range of the external light incident throughthe non-display area NDA of the second base substrate BS2, except forlight in the blue wavelength range. Also, the light in the bluewavelength range, which is transmitted through the second lightshielding portion BP2 b, may be absorbed by the filter layer FYa havingthe red wavelength range corresponding to the second color andnon-overlapping the adhesive layer SLM. Thus, as the external lightincident through the second base substrate BS2 is double-blocked by thesecond light shielding portion BP2 b and the filter layer FYa, theexternal light reflection may be overall reduced.

Also, light, which is transmitted to the non-display area NDA of thesecond base substrate BS2, among light emitted from the display elementlayer DP-OLED and in a direction toward the second base substrate BS2,is also absorbed by the filter layer FYa. The first color light in theblue wavelength range, which is emitted from the display element layerDP-OLED, may be absorbed by the filter layer FYa that absorbs light inthe remaining wavelength range except for the red wavelength range.Thus, the overall visibility of the display panel DPa may improve.

FIG. 11 is an enlarged cross-sectional view illustrating still anotherembodiment of a display panel DPb.

A display panel DPb in FIG. 11 may have the substantially sameconfiguration as the display panel DPa in FIG. 9B except for the filterlayer FYa and the second light shielding portion BP2 b. Thus, redundantdescription will be omitted in FIG. 11 for convenience of description.

Referring to FIG. 11, the second light shielding portion BP2 b may bedisposed on the second base substrate BS2 while non-overlapping theadhesive layer SLM. A filter layer FYb may be disposed on the secondbase substrate BS2 while covering an entirety of a portion of the secondlight shielding portion BP2 b in the non-display area NDA.

Also, the filter layer FYb may overlap an entirety of the non-displayarea NDA, and at least a portion of the filter layer FYb may be directlydisposed on the second base substrate BS2. In an embodiment, ultravioletlight rays UV incident through the second base substrate BS2 may betransmitted to the adhesive layer SLM through the filter layer FYb, andlight in a partial wavelength range of external light incident throughthe second base substrate BS2 may be absorbed by the filter layer FYband the second light shielding portion BP2 b.

According to one or more embodiment of the invention, the filter layerof the upper display substrate 200 may transmit ultraviolet light raysUV which are irradiated to a material for forming the adhesive layer SLMdisposed between the upper display substrate 200 and the lower displaysubstrate 100, and absorb a portion of external light in a predeterminedwavelength range among the wavelength ranges of the external light whichis incident to the display panel from the outside thereof.

Thus, as the reflection of the external light is reduced by the lightblocking area of the display panel at the filter layer, the displaypanel having improved visibility of an image displayed thereby may beprovided.

The invention has been particularly shown and described with referenceto embodiments thereof. While specific terms were used, they were notused to limit the meaning or the scope of the invention described inclaims, but merely used to explain the invention. Accordingly, a personhaving ordinary skill in the art will understand from the above thatvarious modifications and other equivalent embodiments are alsopossible. Hence, the real protective scope of the invention shall bedetermined by the technical scope of the accompanying claims.

What is claimed is:
 1. A display panel comprising: an upper display substrate defining a display area and a non-display area which is adjacent to the display area; a lower display substrate facing the upper display substrate; and a sealing member which couples the upper display substrate to the lower display substrate, the sealing member disposed in the non-display area, wherein the upper display substrate comprises: a base substrate; a light shielding layer comprising a first portion which corresponds to the display area and a second portion which corresponds to the non-display area; and a filter layer which is in the non-display area, the filter layer having a color different from a color of the second portion of the light shielding layer and overlapping the sealing member.
 2. The display panel of claim 1, wherein the filter layer surrounds the display area on the plane.
 3. The display panel of claim 1, wherein in the non-display area, the second portion of the light shielding layer overlaps the sealing member.
 4. The display panel of claim 1, wherein the filter layer is disposed on the base substrate while entirely overlapping the sealing member.
 5. The display panel of claim 4, wherein the filter layer covers at least one portion of the second portion of the light shielding layer.
 6. The display panel of claim 5, wherein the filter layer has a blue color or a red color, and the first portion and the second portion of the light shielding layer each has a black color.
 7. The display panel of claim 4, wherein the display area of the upper display substrate comprises: first to third pixel areas at which light is emitted, and a light shielding area adjacent to each of the first to third pixel areas, and the lower display substrate comprises a display element layer comprising first to third display elements each of which emits light having a first color, the first to third display elements of the lower display substrate corresponding to the first to third pixel areas of the upper display substrate, respectively.
 8. The display panel of claim 7, wherein the first portion of the light shielding layer corresponds to the light shielding area which is adjacent to each of the first to third pixel areas.
 9. The display panel of claim 7, wherein the upper display substrate further comprises a color filter layer on the base substrate, the color filter layer comprising: a first color filter through which light having a second color different from the first color is transmitted, the first color filter corresponding to the first pixel area; a second color filter through which light having a third color different from the first color and the second color is transmitted, the second color filter corresponding to the second pixel area; and a third color filter comprising a filter portion through which light having the first color is transmitted, the filter portion of the third color filter corresponding to the third pixel area.
 10. The display panel of claim 9, wherein the upper display substrate further comprises a light control layer which receives the light having the first color which is emitted from the first to third display elements and provides color-converted light to the color filter layer, the light control layer comprising: a first conversion member which corresponds to the first color filter, color-converts the light having the first color which is emitted from the display element layer into the light having the second color, and emits the light having the second color to the first color filter; a second conversion member which corresponds to the second color filter, color-converts the light having the first color into the light having the third color, and emits the light having the third color to the second color filter; and a transmission member which corresponds to the third color filter and transmits the light having the first color to the third color filter.
 11. The display panel of claim 9, wherein the filter portion of the third color filter, the first portion of the light shielding layer and the second portion of the light shielding layer are respective portions of a same layer on the base substrate.
 12. The display panel of claim 11, wherein the filter layer corresponds to an entirety of the non-display area.
 13. The display panel of claim 11, wherein each of the filter portion of the third color filter, the first portion of the light shielding layer and the second portion of the light shielding layer has a blue color, and the filter layer has a red color.
 14. The display panel of claim 1, wherein in the non-display area: the filter layer corresponds to the first area of the base substrate and extends from the first area of the base substrate to overlap an entirety of the second portion of the light shielding layer which is in the non-display area, and a portion of the filter layer which corresponds to the sealing member is directly on the base substrate.
 15. A display panel comprising: an upper display substrate defining: a display area comprising a plurality of pixel areas and a light shielding area which is adjacent to each of the plurality of pixel areas, and a non-display area which is adjacent to the display area; a lower display substrate facing the upper display substrate; and a sealing member which couples the upper display substrate to the lower display substrate, the sealing member disposed in the non-display area, wherein the upper display substrate comprises: a base substrate; a color filter layer comprising a first light shielding portion which corresponds to the light shielding area in the display area and a second light shielding portion which corresponds to the non-display area, each of the first light shielding portion and the second light shielding portion having a first color; and a filter layer which is in the non-display area, the filter layer disposed non-overlapping the sealing member.
 16. The display panel of claim 15, wherein the filter layer surrounds the display area.
 17. The display panel of claim 16, wherein the first color of the first light shielding portion and the second light shielding portion is a blue color, and the filter layer has a red color.
 18. The display panel of claim 15, wherein the second light shielding portion overlaps an entirety of the non-display area, and the sealing member surrounds the filter layer.
 19. The display panel of claim 15, wherein the color filter layer comprises: a first color filter through which light having a second color different from the first color is transmitted, the first color filter corresponding to a first pixel area among the plurality of pixel areas; a second color filter through which light having a third color different from the first color and the second color is transmitted, the second color filter corresponding to a second pixel area adjacent to the first pixel area among the plurality of pixel areas; and a third color filter comprising a filter portion corresponding to a third pixel area adjacent to the second pixel area among the plurality of pixel areas and through which light having the first color is transmitted, wherein the first light shielding portion and the second light shielding portion are in a same layer as the filter portion and transmit the light having the first color.
 20. A display panel comprising: an upper display substrate to which light from outside the display panel is incident, the upper display substrate defining a display area and a non-display area which is adjacent to the display area; a lower display substrate facing the upper display substrate; and a sealing member which couples the upper display substrate to the lower display substrate, the sealing member disposed in the non-display area, wherein the upper display substrate comprises: a base substrate through which the light from outside the display panel is transmitted; a light shielding layer comprising a first portion which corresponds to the display area and a second portion which corresponds to the non-display area and absorbs a portion of light which is transmitted through the base substrate at the non-display area; and a filter layer which is in the non-display area and absorbs a portion of the light which is transmitted through the base substrate at the non-display area, the filter layer having a color different from a color of the second portion of the light shielding layer, wherein in the non-display area, the base substrate comprises a first area which corresponds to the sealing member and a second area which is between the first area and the display area, in the first area of the base substrate, only one among the filter layer and the second portion of the light shielding layer is disposed, and in the second area of the base substrate: both the filter layer and the second portion of the light shielding layer are disposed, and the second portion of the light shielding layer is between the base substrate and the filter layer along a thickness direction of the display panel. 